A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted in the Last 31 Days

Compiled at 1353 UTC on 18 June 2013

[ The Tracking News | ephemerides | cleared ]

Missing something? Check the archives for objects not under active observation or recent analysis.

Notes: The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both risk monitors also post a few special objects with impact solutions beyond 100 years. For the latest official risk assessments, and for explanations of terminology and methodology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.
0000NNN000 Object	Risk Monitor	A/CC Noted Time & Day UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Latest Risk Assessments

2013 LZ28	NEODyS	1353 June 18	2060-2098	4	1.08e-06	-4.56	-4.58	0	Based on 49 optical observations (of which 3 are rejected as outliers) from 2013-06-13.254 to 2013-06-17.333.
	JPL Sentry	1353 June 18	2060	2	9.0e-07	-4.63	-4.66	0	Analysis based on 47 observations spanning 4.0781 days (2013-Jun-13.25363 to 2013-Jun-17.33176). Diameter approximately 0.110 km. from mean, weighted H=22.4.
	Assessment postings were noted by A/CC on 15 June, 16 June, 17 June & 18 June - References: MPEC 2013-L74 plus DOUs 2013-M04 & 2013-M18

2013 LG16	NEODyS	1353 June 18	2050-2052	3	2.63e-06	-2.85	-3.11	0	Based on 35 optical observations (of which 0 are rejected as outliers) from 2013-06-07.414 to 2013-06-17.378.
	JPL Sentry	1353 June 18	2050-2111	22	1.2e-06	-3.23	-3.24	0	Analysis based on 35 observations spanning 9.9635 days (2013-Jun-07.41346 to 2013-Jun-17.37691). Diameter approximately 0.440 km. from mean, weighted H=19.4.
	Assessment postings were noted by A/CC on 12 June, 13 June, 15 June & 18 June - References: MPEC 2013-L50 plus DOUs 2013-L59, 2013-L62, 2013-L68 & 2013-M18

2013 JA17	JPL Sentry	1900 May 27	2054-2111	6	3.8e-09	-5.69	-6.09	0	Analysis based on 13 observations spanning 3.9520 days (2013-May-08.43448 to 2013-May-12.38647). Diameter approximately 0.518 km. from mean, weighted H=19.1.
	An assessment posting was noted by A/CC on 27 May - References: no MPECs

2013 BR27	NEODyS	1452 June 14	2067-2110	51	2.99e-05	-6.04	-6.41	0	Based on 21 optical observations (of which 0 are rejected as outliers) from 2013-01-20.391 to 2013-02-01.545.
	JPL Sentry	1452 June 14	2073-2106	36	2.6e-05	-6.10	-6.49	0	Analysis based on 21 observations spanning 12.153 days (2013-Jan-20.39041 to 2013-Feb-01.543753). Diameter approximately 0.010 km. from mean, weighted H=27.7.
	Assessment postings were noted by A/CC on 14 June - References: DOU 2013-L66

2013 BL18	NEODyS	1452 June 14	2070-2092	8	1.86e-05	-5.29	-5.46	0	Based on 28 optical observations (of which 1 are rejected as outliers) from 2013-01-17.285 to 2013-02-01.568.
	JPL Sentry	1452 June 14	2070-2092	5	1.2e-05	-5.47	-5.69	0	Analysis based on 28 observations spanning 15.283 days (2013-Jan-17.28384 to 2013-Feb-01.567256). Diameter approximately 0.022 km. from mean, weighted H=26.0.
	Assessment postings were noted by A/CC on 14 June - References: DOU 2013-L66
C L E A R E D
2013 LT28	JPL Sentry	1452 June 14	R E M O V E D						Risk listing removed at 1031 UTC 14 June
	Assessment postings were noted by A/CC on 13 June & 14 June - References: MPEC 2013-L63 plus DOUs 2013-L66, 2013-L68 & 2013-M01

2013 LH16	JPL Sentry	1452 June 14	R E M O V E D						Risk listing removed at 1032 UTC 14 June
	Assessment postings were noted by A/CC on 10 June, 11 June, 12 June, 13 June & 14 June - References: MPEC 2013-L51 plus DOUs 2013-L54, 2013-L59, 2013-L62, 2013-L66, 2013-L68, 2013-M01 & 2013-M18

2013 LE16	JPL Sentry	1452 June 14	R E M O V E D						Risk listing removed at 1030 UTC 14 June
	NEODyS	1347 June 13	R E M O V E D
	Assessment postings were noted by A/CC on 10 June, 11 June, 12 June, 13 June & 14 June - References: MPEC 2013-L48 plus DOUs 2013-L54, 2013-L59, 2013-L62, 2013-L66 & 2013-L68

2013 LC1	NEODyS	1404 June 6	R E M O V E D
	JPL Sentry	1404 June 6	R E M O V E D						Risk listing removed at 0955 UTC 6 June
	Assessment postings were noted by A/CC on 5 June & 6 June - References: MPEC 2013-L15 plus DOUs 2013-L20, 2013-L28, 2013-L31, 2013-L37, 2013-L42, 2013-L44, 2013-L66 & 2013-M01

2013 LB	JPL Sentry	1259 June 4	R E M O V E D						Risk listing removed at 0955 UTC 4 June
	NEODyS	1259 June 4	R E M O V E D
	Assessment postings were noted by A/CC on 2 June, 3 June & 4 June - References: MPEC 2013-L08 plus DOUs 2013-L12, 2013-L20, 2013-L28, 2013-L37, 2013-L42, 2013-L44 & 2013-M18

2013 KG6	JPL Sentry	1409 June 2	R E M O V E D						Risk listing removed at 1150 UTC 2 June
	Assessment postings were noted by A/CC on 31 May & 2 June - References: MPEC 2013-K50 plus DOU 2013-L02

2013 JD34	NEODyS	1812 May 22	R E M O V E D
	JPL Sentry	1341 May 22	R E M O V E D						Risk listing removed at 0951 UTC 22 May
	Assessment postings were noted by A/CC on 18 May & 22 May - References: DOU 2013-K33

2013 JR28	NEODyS	1333 May 18	R E M O V E D
	JPL Sentry	1333 May 18	R E M O V E D						Risk listing removed at 0950 UTC 18 May
	Assessment postings were noted by A/CC on 18 May - References: DOUs 2013-K12, 2013-K32, 2013-K33, 2013-K45, 2013-K48, 2013-L12, 2013-L20, 2013-L28, 2013-L31, 2013-L37, 2013-L42, 2013-L44, 2013-L54, 2013-L59, 2013-L62, 2013-L66, 2013-L68, 2013-M01 & 2013-M04, radar: 17 June

2013 JM22	JPL Sentry	2008 May 20	R E M O V E D						Risk listing removed at 1955 UTC 20 May
	An assessment posting was noted by A/CC on 20 May - References: DOUs 2013-K12 & 2013-K32

2013 JS17	NEODyS	1333 May 18	R E M O V E D
	JPL Sentry	1333 May 18	R E M O V E D						Risk listing removed at 0951 UTC 18 May
	Assessment postings were noted by A/CC on 18 May - References: DOUs 2013-K12 & 2013-K33

2011 BT15	NEODyS	1353 June 18	R E M O V E D
	JPL Sentry	2359 June 17	R E M O V E D						Risk listing removed at 2356 UTC 17 June
	Assessment postings were noted by A/CC on 17 June & 18 June - References: MPEC 2013-M09 plus DOU 2013-M18

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

For a list of risk-rated objects currently under observation, see our ephemerides page.

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" for more information.

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